From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC863C433B4 for ; Mon, 10 May 2021 16:37:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B051E6115C for ; Mon, 10 May 2021 16:37:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231601AbhEJQia (ORCPT ); Mon, 10 May 2021 12:38:30 -0400 Received: from mail-mw2nam08on2054.outbound.protection.outlook.com ([40.107.101.54]:41376 "EHLO NAM04-MW2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S231667AbhEJQiT (ORCPT ); Mon, 10 May 2021 12:38:19 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ObCBA/iEVVokAklFfgiqo5mEDQqpuCAWZ8mKNVwZpGaFN/g8xY6aUZW+m/s9gyvJ9Jk7rfA/J+rB7Xikd7OLzWA6OETHanJrnAnxOkRbriZOd14Kl5ql29ByGXIyQNOQuSWTNbDDPtwJbwuZHNd1vOmbo0NRKQYqZNGMfDsmgT/NHrRJ819cULumkUSCzHrNSO4LlAQBFVUT3URxfIVwukYGhiH17BBXmjdZGQ0oNZ/olCYTHK2jOIYQLo1joJsOBaFdePhGykpbQ48H2TxGRID9yAGjDlRjrdAtI8IZTxF9OV5IUwBaGNglG3UWo/oPZ2jbdRHfECvgEItdktIxEw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TW/TKpFRu1X4rRTXhKdo8M0et9MXFShEHfYdvlK6R68=; b=Hj1bOzu3i9NlOs5NAyRV71Aa3fwe7eKZ6YJu/9rQZd8FbZNMnrRfecoh9O9ZvrHWd0kkeBp9U8dY7iKvjXzdhxgmz04+9Xqcx3Xi1XnMt0z7x60VyXBOpGiVxwEk5sbQr/x6MTJUAowC0AO9NqnsF2zwzHwJS+DyIZnmrRylmWB4Zm8eZgGmraOkwnczfLPV1ETnG+i3ONN508fi5MNk3QUpUu2pxE2PN5fi1owE5TmzocVP6YY4hGaZylWzwRj7knWi2Qb4HInKyoMSSNyFI18F8NSIRQqsfmBinHztMy3lw7FwF+0TssVJkSdJeaPp+aGgcDzetSQo6GydpWZRVA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TW/TKpFRu1X4rRTXhKdo8M0et9MXFShEHfYdvlK6R68=; b=EOriBtda1zGRrKxlaTjyVau2EXODh1ZYQUJguN0aQK7K3eoo/qNVOQjRvPJMJbUuubR/JZPbJXe8rJJLho72Oam4kRrGhT54lMTjtlhPxaFELSuPrB6WRM36/u4QhDur/nV+NIH2MzwEXhb/oIKWdaIt0a++Gt5rB5z5P1zE1yA= Authentication-Results: lists.freedesktop.org; dkim=none (message not signed) header.d=none;lists.freedesktop.org; dmarc=none action=none header.from=amd.com; Received: from SN6PR12MB4623.namprd12.prod.outlook.com (2603:10b6:805:e9::17) by SN6PR12MB4717.namprd12.prod.outlook.com (2603:10b6:805:e2::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.24; Mon, 10 May 2021 16:37:13 +0000 Received: from SN6PR12MB4623.namprd12.prod.outlook.com ([fe80::ad51:8c49:b171:856c]) by SN6PR12MB4623.namprd12.prod.outlook.com ([fe80::ad51:8c49:b171:856c%7]) with mapi id 15.20.4108.031; Mon, 10 May 2021 16:37:13 +0000 From: Andrey Grodzovsky To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-pci@vger.kernel.org, ckoenig.leichtzumerken@gmail.com, daniel.vetter@ffwll.ch, Harry.Wentland@amd.com Cc: ppaalanen@gmail.com, Alexander.Deucher@amd.com, gregkh@linuxfoundation.org, helgaas@kernel.org, Felix.Kuehling@amd.com, Andrey Grodzovsky Subject: [PATCH v6 16/16] drm/amdgpu: Verify DMA opearations from device are done Date: Mon, 10 May 2021 12:36:25 -0400 Message-Id: <20210510163625.407105-17-andrey.grodzovsky@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210510163625.407105-1-andrey.grodzovsky@amd.com> References: <20210510163625.407105-1-andrey.grodzovsky@amd.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [2607:fea8:3edf:49b0:6a5:47b8:e610:f6a3] X-ClientProxiedBy: YT2PR01CA0020.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:38::25) To SN6PR12MB4623.namprd12.prod.outlook.com (2603:10b6:805:e9::17) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from agrodzovsky-All-Series.hitronhub.home (2607:fea8:3edf:49b0:6a5:47b8:e610:f6a3) by YT2PR01CA0020.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:38::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.31 via Frontend Transport; Mon, 10 May 2021 16:37:12 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 511bbdbc-0f0e-4b6b-2529-08d913d1dd34 X-MS-TrafficTypeDiagnostic: SN6PR12MB4717: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5516; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: /L9CmCspkysqpaQBheakBvPIM26S+qtk+vh0d+N+6DbkQtKNIsDCxUJN3YilM3t+nbBa6c3w40Kh7kSknxhr/Dwkjo55D0Gzv2jzwu/ANJMcq1r35vNOcYEUBD9Uz3j4P3c6sSBHXGim2fBPCk2mQlT/satTSL4YAjP45kIjKcEVOoxbZrtWz8Y/TYYzkh7XqPeNvMRrOolg7VbY7Ikt+PJACuNYiIaUrtS+RzzRdJcXMU04BK8H/+f/ysWft9H3H6FjhJz+zXXcTchEo7e2ys5loLDq695grqluW5uzBixtEg+xAbZgFpm8dGIYVHO1b8QgpkWqA5wshFR/vVTJCAlXipF6U/5TiqQXzbR3T6CC5dhIe3lDYg6WNT35NgBlKDvhs5RXRwKMx7Du/BTwIdu9mN/aC1MVTMRXuvdM/zT5Oda6wG6bDkmv7rC9rjNNm3ai462E39j9Vu52+3ByhUTpR5CUrCFKUybhGvM2/sfi+t2ZnGsOds5KZotivLSvD3jMXHJFySUtMh4ggA/FvgZ0mUN9ts+Zah1BiaweIWyoEzEQOo6FOMOZ5aBp1+kaXFdUMcJ8/MZVIBWTCURF2LFceSt5qUrrHyKajwOh7DU= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR12MB4623.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(39860400002)(376002)(346002)(396003)(136003)(366004)(6486002)(44832011)(83380400001)(5660300002)(2616005)(8676002)(1076003)(86362001)(6506007)(478600001)(186003)(16526019)(8936002)(6512007)(6666004)(38100700002)(36756003)(4744005)(15650500001)(52116002)(2906002)(316002)(4326008)(66946007)(6636002)(66476007)(66556008);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?ENnE1pL4eiFcR5j57zgoDX9ao6yk8PB+wJbFBSAR1ve1rab4skd3QnSBRlcw?= =?us-ascii?Q?IFPUMqLw2uPMFCz+XfXPyfHYeUCBX46kb9ZLb27KsSoPirSFdMio/d4fQ5JR?= =?us-ascii?Q?7dIZjsRVOxYr+QaiK3OC3d43msyndGONX0icAOel0NM0faIUHjtylRNQZjwI?= =?us-ascii?Q?Lv4LI7mfaWCnUKtUQRYSflV1GpRECxCHLUT+DzTzXFe6s/aR5ek3uOv3d6eu?= =?us-ascii?Q?vjvrAXMOLpXLfWYvC+mQjp3keNBtLFoCK9ihRBhcmynKkxxc5v70sHaByVEV?= =?us-ascii?Q?71gqvq8U6Wq1Q8L9rdo3b3g4XcrFX9ZLZuschnt4fbJLGh4/blFrwfB3qgT8?= =?us-ascii?Q?gtKKQMUFuvUz304+TD5hTlAnepLNgagXC66Sm+TcQIXtQa7AafQ4jE8UuAoe?= =?us-ascii?Q?ZqyWrppqvG5Kw2nqPYgN/r/Ux98BlKxZImhn6MUuo+rEK3IugsFK9aYWeVKi?= =?us-ascii?Q?9VJIDFU0yhPvXJXpd3yikZV/ph2AnrPN6eDeRhn6KoNzTvoX00aKKTuj4w5n?= =?us-ascii?Q?UZegWorDm1+RoMEHHTPM5M3w9BU4kgCsiwzuIXrPjQXSoCzOiqEQvaJXcoeV?= =?us-ascii?Q?Z/rssoS6Hcg8SFuAlqa5I/uVWj2T2lC3yH0eBJnGdgQd2lbZhkqOfB/G7AJj?= =?us-ascii?Q?VrogD+WFF4hVZiyBPckCb+4FU/7yW3Y4kX5YawYjq3B6IAffdNkZYz0XY3sx?= =?us-ascii?Q?qqlLiLTMpFuXOSwGfCthDJ4FoGcBGQnvAMDD4NNaFFlZgrO86+E7qrpW+Lof?= =?us-ascii?Q?PUX/JPVhfleeUN2es6FvklAaybVDx6FMgG7zLPFK4QivpwMfEK3sJmgOa+rV?= =?us-ascii?Q?VoK+JXREBZz2MVJuEfG2ffqHLhAO/mTzpDUEi6rnxmP1aJMcd+18Cakjz/l1?= =?us-ascii?Q?7dJZySDBze+ExBRPDYzNQgtGY6jkqd2XJNUawGu1ZIBJnzgNC1A1DGnjATGq?= =?us-ascii?Q?quBtjPF/w5VWSomz3xek4Tb7EbWfwKC5FY0wNekrxAK4v1hatgKcoxDeuR38?= =?us-ascii?Q?ZHtbulSxP6vMK14E28CoRORmG77x+HHOv/+6DrvL86qbHvK7+8hTfZFA6+Sk?= =?us-ascii?Q?1KAQMT26IVahdFTzzaj/7Nuiyt1TmatjoyIimmKaphGs1H6LsdODCTaBhhDu?= =?us-ascii?Q?IRB/OAMh2PeYDfLr9xBc2SmsOYxNqUlm69EoNSybfxFteQd0C+PT3SJI/U02?= =?us-ascii?Q?8DArIjlDKXF79I3mC6QgGpSOUl+JMzeMDPr3XOGWRQvnJpRy5vdVTZYoP0qb?= =?us-ascii?Q?nfCdJheyKhRMmhVZDEHPm2JrisqN9hOEDs0vFFy207EMKVT/yKpuXmpMKzNF?= =?us-ascii?Q?UaBLAfGH573YtIdEqeSDz+WDPS9Jf5zwECV3vEpdJmOX3YD9eJqozYPmFzH/?= =?us-ascii?Q?90HpSVNq8ZtJKKHFX4YBEIo1ek5s?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 511bbdbc-0f0e-4b6b-2529-08d913d1dd34 X-MS-Exchange-CrossTenant-AuthSource: SN6PR12MB4623.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 May 2021 16:37:13.2089 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 8pDQbXBjLz/JM3DU7CAZO4gsYsS9X8xJkbIFcM5o06SMbK1ULnUTyWUuFy80rk83tMc+smPDQh7ganAC4hI9gQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR12MB4717 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org In case device remove is just simualted by sysfs then verify device doesn't keep doing DMA to the released memory after pci_remove is done. Signed-off-by: Andrey Grodzovsky --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 83006f45b10b..5e6af9e0b7bf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1314,7 +1314,13 @@ amdgpu_pci_remove(struct pci_dev *pdev) drm_dev_unplug(dev); amdgpu_driver_unload_kms(dev); + /* + * Flush any in flight DMA operations from device. + * Clear the Bus Master Enable bit and then wait on the PCIe Device + * StatusTransactions Pending bit. + */ pci_disable_device(pdev); + pci_wait_for_pending_transaction(pdev); } static void -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60DBCC43611 for ; Mon, 10 May 2021 16:37:24 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 314D5611AB for ; Mon, 10 May 2021 16:37:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 314D5611AB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=amd.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 307E96E8C7; Mon, 10 May 2021 16:37:16 +0000 (UTC) Received: from NAM04-MW2-obe.outbound.protection.outlook.com (mail-mw2nam08on2083.outbound.protection.outlook.com [40.107.101.83]) by gabe.freedesktop.org (Postfix) with ESMTPS id 88F7F6E8C5; Mon, 10 May 2021 16:37:14 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ObCBA/iEVVokAklFfgiqo5mEDQqpuCAWZ8mKNVwZpGaFN/g8xY6aUZW+m/s9gyvJ9Jk7rfA/J+rB7Xikd7OLzWA6OETHanJrnAnxOkRbriZOd14Kl5ql29ByGXIyQNOQuSWTNbDDPtwJbwuZHNd1vOmbo0NRKQYqZNGMfDsmgT/NHrRJ819cULumkUSCzHrNSO4LlAQBFVUT3URxfIVwukYGhiH17BBXmjdZGQ0oNZ/olCYTHK2jOIYQLo1joJsOBaFdePhGykpbQ48H2TxGRID9yAGjDlRjrdAtI8IZTxF9OV5IUwBaGNglG3UWo/oPZ2jbdRHfECvgEItdktIxEw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TW/TKpFRu1X4rRTXhKdo8M0et9MXFShEHfYdvlK6R68=; b=Hj1bOzu3i9NlOs5NAyRV71Aa3fwe7eKZ6YJu/9rQZd8FbZNMnrRfecoh9O9ZvrHWd0kkeBp9U8dY7iKvjXzdhxgmz04+9Xqcx3Xi1XnMt0z7x60VyXBOpGiVxwEk5sbQr/x6MTJUAowC0AO9NqnsF2zwzHwJS+DyIZnmrRylmWB4Zm8eZgGmraOkwnczfLPV1ETnG+i3ONN508fi5MNk3QUpUu2pxE2PN5fi1owE5TmzocVP6YY4hGaZylWzwRj7knWi2Qb4HInKyoMSSNyFI18F8NSIRQqsfmBinHztMy3lw7FwF+0TssVJkSdJeaPp+aGgcDzetSQo6GydpWZRVA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TW/TKpFRu1X4rRTXhKdo8M0et9MXFShEHfYdvlK6R68=; b=EOriBtda1zGRrKxlaTjyVau2EXODh1ZYQUJguN0aQK7K3eoo/qNVOQjRvPJMJbUuubR/JZPbJXe8rJJLho72Oam4kRrGhT54lMTjtlhPxaFELSuPrB6WRM36/u4QhDur/nV+NIH2MzwEXhb/oIKWdaIt0a++Gt5rB5z5P1zE1yA= Authentication-Results: lists.freedesktop.org; dkim=none (message not signed) header.d=none; lists.freedesktop.org; dmarc=none action=none header.from=amd.com; Received: from SN6PR12MB4623.namprd12.prod.outlook.com (2603:10b6:805:e9::17) by SN6PR12MB4717.namprd12.prod.outlook.com (2603:10b6:805:e2::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.24; Mon, 10 May 2021 16:37:13 +0000 Received: from SN6PR12MB4623.namprd12.prod.outlook.com ([fe80::ad51:8c49:b171:856c]) by SN6PR12MB4623.namprd12.prod.outlook.com ([fe80::ad51:8c49:b171:856c%7]) with mapi id 15.20.4108.031; Mon, 10 May 2021 16:37:13 +0000 From: Andrey Grodzovsky To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-pci@vger.kernel.org, ckoenig.leichtzumerken@gmail.com, daniel.vetter@ffwll.ch, Harry.Wentland@amd.com Subject: [PATCH v6 16/16] drm/amdgpu: Verify DMA opearations from device are done Date: Mon, 10 May 2021 12:36:25 -0400 Message-Id: <20210510163625.407105-17-andrey.grodzovsky@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210510163625.407105-1-andrey.grodzovsky@amd.com> References: <20210510163625.407105-1-andrey.grodzovsky@amd.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [2607:fea8:3edf:49b0:6a5:47b8:e610:f6a3] X-ClientProxiedBy: YT2PR01CA0020.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:38::25) To SN6PR12MB4623.namprd12.prod.outlook.com (2603:10b6:805:e9::17) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from agrodzovsky-All-Series.hitronhub.home (2607:fea8:3edf:49b0:6a5:47b8:e610:f6a3) by YT2PR01CA0020.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:38::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.31 via Frontend Transport; Mon, 10 May 2021 16:37:12 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 511bbdbc-0f0e-4b6b-2529-08d913d1dd34 X-MS-TrafficTypeDiagnostic: SN6PR12MB4717: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5516; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SN6PR12MB4623.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(39860400002)(376002)(346002)(396003)(136003)(366004)(6486002)(44832011)(83380400001)(5660300002)(2616005)(8676002)(1076003)(86362001)(6506007)(478600001)(186003)(16526019)(8936002)(6512007)(6666004)(38100700002)(36756003)(4744005)(15650500001)(52116002)(2906002)(316002)(4326008)(66946007)(6636002)(66476007)(66556008); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?ENnE1pL4eiFcR5j57zgoDX9ao6yk8PB+wJbFBSAR1ve1rab4skd3QnSBRlcw?= =?us-ascii?Q?IFPUMqLw2uPMFCz+XfXPyfHYeUCBX46kb9ZLb27KsSoPirSFdMio/d4fQ5JR?= =?us-ascii?Q?7dIZjsRVOxYr+QaiK3OC3d43msyndGONX0icAOel0NM0faIUHjtylRNQZjwI?= =?us-ascii?Q?Lv4LI7mfaWCnUKtUQRYSflV1GpRECxCHLUT+DzTzXFe6s/aR5ek3uOv3d6eu?= =?us-ascii?Q?vjvrAXMOLpXLfWYvC+mQjp3keNBtLFoCK9ihRBhcmynKkxxc5v70sHaByVEV?= =?us-ascii?Q?71gqvq8U6Wq1Q8L9rdo3b3g4XcrFX9ZLZuschnt4fbJLGh4/blFrwfB3qgT8?= =?us-ascii?Q?gtKKQMUFuvUz304+TD5hTlAnepLNgagXC66Sm+TcQIXtQa7AafQ4jE8UuAoe?= =?us-ascii?Q?ZqyWrppqvG5Kw2nqPYgN/r/Ux98BlKxZImhn6MUuo+rEK3IugsFK9aYWeVKi?= =?us-ascii?Q?9VJIDFU0yhPvXJXpd3yikZV/ph2AnrPN6eDeRhn6KoNzTvoX00aKKTuj4w5n?= =?us-ascii?Q?UZegWorDm1+RoMEHHTPM5M3w9BU4kgCsiwzuIXrPjQXSoCzOiqEQvaJXcoeV?= =?us-ascii?Q?Z/rssoS6Hcg8SFuAlqa5I/uVWj2T2lC3yH0eBJnGdgQd2lbZhkqOfB/G7AJj?= =?us-ascii?Q?VrogD+WFF4hVZiyBPckCb+4FU/7yW3Y4kX5YawYjq3B6IAffdNkZYz0XY3sx?= =?us-ascii?Q?qqlLiLTMpFuXOSwGfCthDJ4FoGcBGQnvAMDD4NNaFFlZgrO86+E7qrpW+Lof?= =?us-ascii?Q?PUX/JPVhfleeUN2es6FvklAaybVDx6FMgG7zLPFK4QivpwMfEK3sJmgOa+rV?= =?us-ascii?Q?VoK+JXREBZz2MVJuEfG2ffqHLhAO/mTzpDUEi6rnxmP1aJMcd+18Cakjz/l1?= =?us-ascii?Q?7dJZySDBze+ExBRPDYzNQgtGY6jkqd2XJNUawGu1ZIBJnzgNC1A1DGnjATGq?= =?us-ascii?Q?quBtjPF/w5VWSomz3xek4Tb7EbWfwKC5FY0wNekrxAK4v1hatgKcoxDeuR38?= =?us-ascii?Q?ZHtbulSxP6vMK14E28CoRORmG77x+HHOv/+6DrvL86qbHvK7+8hTfZFA6+Sk?= =?us-ascii?Q?1KAQMT26IVahdFTzzaj/7Nuiyt1TmatjoyIimmKaphGs1H6LsdODCTaBhhDu?= =?us-ascii?Q?IRB/OAMh2PeYDfLr9xBc2SmsOYxNqUlm69EoNSybfxFteQd0C+PT3SJI/U02?= =?us-ascii?Q?8DArIjlDKXF79I3mC6QgGpSOUl+JMzeMDPr3XOGWRQvnJpRy5vdVTZYoP0qb?= =?us-ascii?Q?nfCdJheyKhRMmhVZDEHPm2JrisqN9hOEDs0vFFy207EMKVT/yKpuXmpMKzNF?= =?us-ascii?Q?UaBLAfGH573YtIdEqeSDz+WDPS9Jf5zwECV3vEpdJmOX3YD9eJqozYPmFzH/?= =?us-ascii?Q?90HpSVNq8ZtJKKHFX4YBEIo1ek5s?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 511bbdbc-0f0e-4b6b-2529-08d913d1dd34 X-MS-Exchange-CrossTenant-AuthSource: SN6PR12MB4623.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 May 2021 16:37:13.2089 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 8pDQbXBjLz/JM3DU7CAZO4gsYsS9X8xJkbIFcM5o06SMbK1ULnUTyWUuFy80rk83tMc+smPDQh7ganAC4hI9gQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR12MB4717 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gregkh@linuxfoundation.org, Felix.Kuehling@amd.com, helgaas@kernel.org, Alexander.Deucher@amd.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" In case device remove is just simualted by sysfs then verify device doesn't keep doing DMA to the released memory after pci_remove is done. Signed-off-by: Andrey Grodzovsky --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 83006f45b10b..5e6af9e0b7bf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1314,7 +1314,13 @@ amdgpu_pci_remove(struct pci_dev *pdev) drm_dev_unplug(dev); amdgpu_driver_unload_kms(dev); + /* + * Flush any in flight DMA operations from device. + * Clear the Bus Master Enable bit and then wait on the PCIe Device + * StatusTransactions Pending bit. + */ pci_disable_device(pdev); + pci_wait_for_pending_transaction(pdev); } static void -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D86CC43462 for ; Mon, 10 May 2021 16:37:24 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D4F7D611AB for ; Mon, 10 May 2021 16:37:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D4F7D611AB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=amd.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=amd-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 810B86E8C9; Mon, 10 May 2021 16:37:16 +0000 (UTC) Received: from NAM04-MW2-obe.outbound.protection.outlook.com (mail-mw2nam08on2083.outbound.protection.outlook.com [40.107.101.83]) by gabe.freedesktop.org (Postfix) with ESMTPS id 88F7F6E8C5; Mon, 10 May 2021 16:37:14 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ObCBA/iEVVokAklFfgiqo5mEDQqpuCAWZ8mKNVwZpGaFN/g8xY6aUZW+m/s9gyvJ9Jk7rfA/J+rB7Xikd7OLzWA6OETHanJrnAnxOkRbriZOd14Kl5ql29ByGXIyQNOQuSWTNbDDPtwJbwuZHNd1vOmbo0NRKQYqZNGMfDsmgT/NHrRJ819cULumkUSCzHrNSO4LlAQBFVUT3URxfIVwukYGhiH17BBXmjdZGQ0oNZ/olCYTHK2jOIYQLo1joJsOBaFdePhGykpbQ48H2TxGRID9yAGjDlRjrdAtI8IZTxF9OV5IUwBaGNglG3UWo/oPZ2jbdRHfECvgEItdktIxEw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TW/TKpFRu1X4rRTXhKdo8M0et9MXFShEHfYdvlK6R68=; b=Hj1bOzu3i9NlOs5NAyRV71Aa3fwe7eKZ6YJu/9rQZd8FbZNMnrRfecoh9O9ZvrHWd0kkeBp9U8dY7iKvjXzdhxgmz04+9Xqcx3Xi1XnMt0z7x60VyXBOpGiVxwEk5sbQr/x6MTJUAowC0AO9NqnsF2zwzHwJS+DyIZnmrRylmWB4Zm8eZgGmraOkwnczfLPV1ETnG+i3ONN508fi5MNk3QUpUu2pxE2PN5fi1owE5TmzocVP6YY4hGaZylWzwRj7knWi2Qb4HInKyoMSSNyFI18F8NSIRQqsfmBinHztMy3lw7FwF+0TssVJkSdJeaPp+aGgcDzetSQo6GydpWZRVA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TW/TKpFRu1X4rRTXhKdo8M0et9MXFShEHfYdvlK6R68=; b=EOriBtda1zGRrKxlaTjyVau2EXODh1ZYQUJguN0aQK7K3eoo/qNVOQjRvPJMJbUuubR/JZPbJXe8rJJLho72Oam4kRrGhT54lMTjtlhPxaFELSuPrB6WRM36/u4QhDur/nV+NIH2MzwEXhb/oIKWdaIt0a++Gt5rB5z5P1zE1yA= Authentication-Results: lists.freedesktop.org; dkim=none (message not signed) header.d=none; lists.freedesktop.org; dmarc=none action=none header.from=amd.com; Received: from SN6PR12MB4623.namprd12.prod.outlook.com (2603:10b6:805:e9::17) by SN6PR12MB4717.namprd12.prod.outlook.com (2603:10b6:805:e2::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.24; Mon, 10 May 2021 16:37:13 +0000 Received: from SN6PR12MB4623.namprd12.prod.outlook.com ([fe80::ad51:8c49:b171:856c]) by SN6PR12MB4623.namprd12.prod.outlook.com ([fe80::ad51:8c49:b171:856c%7]) with mapi id 15.20.4108.031; Mon, 10 May 2021 16:37:13 +0000 From: Andrey Grodzovsky To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, linux-pci@vger.kernel.org, ckoenig.leichtzumerken@gmail.com, daniel.vetter@ffwll.ch, Harry.Wentland@amd.com Subject: [PATCH v6 16/16] drm/amdgpu: Verify DMA opearations from device are done Date: Mon, 10 May 2021 12:36:25 -0400 Message-Id: <20210510163625.407105-17-andrey.grodzovsky@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210510163625.407105-1-andrey.grodzovsky@amd.com> References: <20210510163625.407105-1-andrey.grodzovsky@amd.com> X-Originating-IP: [2607:fea8:3edf:49b0:6a5:47b8:e610:f6a3] X-ClientProxiedBy: YT2PR01CA0020.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:38::25) To SN6PR12MB4623.namprd12.prod.outlook.com (2603:10b6:805:e9::17) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from agrodzovsky-All-Series.hitronhub.home (2607:fea8:3edf:49b0:6a5:47b8:e610:f6a3) by YT2PR01CA0020.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:38::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.31 via Frontend Transport; Mon, 10 May 2021 16:37:12 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 511bbdbc-0f0e-4b6b-2529-08d913d1dd34 X-MS-TrafficTypeDiagnostic: SN6PR12MB4717: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5516; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SN6PR12MB4623.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(39860400002)(376002)(346002)(396003)(136003)(366004)(6486002)(44832011)(83380400001)(5660300002)(2616005)(8676002)(1076003)(86362001)(6506007)(478600001)(186003)(16526019)(8936002)(6512007)(6666004)(38100700002)(36756003)(4744005)(15650500001)(52116002)(2906002)(316002)(4326008)(66946007)(6636002)(66476007)(66556008); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?ENnE1pL4eiFcR5j57zgoDX9ao6yk8PB+wJbFBSAR1ve1rab4skd3QnSBRlcw?= =?us-ascii?Q?IFPUMqLw2uPMFCz+XfXPyfHYeUCBX46kb9ZLb27KsSoPirSFdMio/d4fQ5JR?= =?us-ascii?Q?7dIZjsRVOxYr+QaiK3OC3d43msyndGONX0icAOel0NM0faIUHjtylRNQZjwI?= =?us-ascii?Q?Lv4LI7mfaWCnUKtUQRYSflV1GpRECxCHLUT+DzTzXFe6s/aR5ek3uOv3d6eu?= =?us-ascii?Q?vjvrAXMOLpXLfWYvC+mQjp3keNBtLFoCK9ihRBhcmynKkxxc5v70sHaByVEV?= =?us-ascii?Q?71gqvq8U6Wq1Q8L9rdo3b3g4XcrFX9ZLZuschnt4fbJLGh4/blFrwfB3qgT8?= =?us-ascii?Q?gtKKQMUFuvUz304+TD5hTlAnepLNgagXC66Sm+TcQIXtQa7AafQ4jE8UuAoe?= =?us-ascii?Q?ZqyWrppqvG5Kw2nqPYgN/r/Ux98BlKxZImhn6MUuo+rEK3IugsFK9aYWeVKi?= =?us-ascii?Q?9VJIDFU0yhPvXJXpd3yikZV/ph2AnrPN6eDeRhn6KoNzTvoX00aKKTuj4w5n?= =?us-ascii?Q?UZegWorDm1+RoMEHHTPM5M3w9BU4kgCsiwzuIXrPjQXSoCzOiqEQvaJXcoeV?= =?us-ascii?Q?Z/rssoS6Hcg8SFuAlqa5I/uVWj2T2lC3yH0eBJnGdgQd2lbZhkqOfB/G7AJj?= =?us-ascii?Q?VrogD+WFF4hVZiyBPckCb+4FU/7yW3Y4kX5YawYjq3B6IAffdNkZYz0XY3sx?= =?us-ascii?Q?qqlLiLTMpFuXOSwGfCthDJ4FoGcBGQnvAMDD4NNaFFlZgrO86+E7qrpW+Lof?= =?us-ascii?Q?PUX/JPVhfleeUN2es6FvklAaybVDx6FMgG7zLPFK4QivpwMfEK3sJmgOa+rV?= =?us-ascii?Q?VoK+JXREBZz2MVJuEfG2ffqHLhAO/mTzpDUEi6rnxmP1aJMcd+18Cakjz/l1?= =?us-ascii?Q?7dJZySDBze+ExBRPDYzNQgtGY6jkqd2XJNUawGu1ZIBJnzgNC1A1DGnjATGq?= =?us-ascii?Q?quBtjPF/w5VWSomz3xek4Tb7EbWfwKC5FY0wNekrxAK4v1hatgKcoxDeuR38?= =?us-ascii?Q?ZHtbulSxP6vMK14E28CoRORmG77x+HHOv/+6DrvL86qbHvK7+8hTfZFA6+Sk?= =?us-ascii?Q?1KAQMT26IVahdFTzzaj/7Nuiyt1TmatjoyIimmKaphGs1H6LsdODCTaBhhDu?= =?us-ascii?Q?IRB/OAMh2PeYDfLr9xBc2SmsOYxNqUlm69EoNSybfxFteQd0C+PT3SJI/U02?= =?us-ascii?Q?8DArIjlDKXF79I3mC6QgGpSOUl+JMzeMDPr3XOGWRQvnJpRy5vdVTZYoP0qb?= =?us-ascii?Q?nfCdJheyKhRMmhVZDEHPm2JrisqN9hOEDs0vFFy207EMKVT/yKpuXmpMKzNF?= =?us-ascii?Q?UaBLAfGH573YtIdEqeSDz+WDPS9Jf5zwECV3vEpdJmOX3YD9eJqozYPmFzH/?= =?us-ascii?Q?90HpSVNq8ZtJKKHFX4YBEIo1ek5s?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 511bbdbc-0f0e-4b6b-2529-08d913d1dd34 X-MS-Exchange-CrossTenant-AuthSource: SN6PR12MB4623.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 May 2021 16:37:13.2089 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 8pDQbXBjLz/JM3DU7CAZO4gsYsS9X8xJkbIFcM5o06SMbK1ULnUTyWUuFy80rk83tMc+smPDQh7ganAC4hI9gQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR12MB4717 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrey Grodzovsky , gregkh@linuxfoundation.org, Felix.Kuehling@amd.com, ppaalanen@gmail.com, helgaas@kernel.org, Alexander.Deucher@amd.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" In case device remove is just simualted by sysfs then verify device doesn't keep doing DMA to the released memory after pci_remove is done. Signed-off-by: Andrey Grodzovsky --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 83006f45b10b..5e6af9e0b7bf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1314,7 +1314,13 @@ amdgpu_pci_remove(struct pci_dev *pdev) drm_dev_unplug(dev); amdgpu_driver_unload_kms(dev); + /* + * Flush any in flight DMA operations from device. + * Clear the Bus Master Enable bit and then wait on the PCIe Device + * StatusTransactions Pending bit. + */ pci_disable_device(pdev); + pci_wait_for_pending_transaction(pdev); } static void -- 2.25.1 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx